Twist somebody’s arm
Definition 1 of 1
Pro Tip 1/3Non-Literal
The phrase is metaphorical and doesn't involve actual physical twisting of someone's arm. 
She said she would never go camping but we managed to twist her arm.
Pro Tip 2/3Social Pressure
Often used to imply that the persuasion involved social pressure or a feeling of obligation rather than force. 
His colleagues twisted his arm into attending the office party.
Pro Tip 3/3Friendly Persuasion
The phrase can imply a friendly and light-hearted persuasion, not a serious or threatening one. 
After much chat and laughter, they finally twisted my arm to join the dance.